"The key takeaway we've reached (after two less than 24 hours playing with the iOS 7 Beta release) is this - every App must consider even basic updates to its UI to survive in a post-iOS 6 world." Great. Telling developers to update their entire application - user interface and behaviour alike - to target a look and behaviour that isn't final yet. Seems like potential for a lot of wasted work here.

I totally agree with you here, however it does go to show that metrics like "woot, developers made 10 bn this year" are totally meaningless, whatever the platform.

Now, a comparison of median revenue and revenue quantiles across platforms would be much more interesting. But I guess that no one wants to do that because it would break the illusion that the mobile market is a software wonderland where it's trivial to make money...